welcome to "cbs this morning." president obama and governor romney get down to business preparing for tomorrow's debate. >>> a new head ache for american airlines. the faa is now investigating why rows of seats are coming loose. >>> the killing of a young mother puts the spotlight on the border patrol, and caroline kennedy talks about just released autopsy of her father. >>> but we begin this morning with a look at today's eye opener. your world in 90 seconds. >> in my view, it's not so much winning and losing or even the people themselves, the president and myself. it's about something bigger than that. >> basically they're keeping me indoors all the time. it's a drag. [ laughter ] they're making me do my homework. >> president obama and mitt romney prepare for the first presidential debate. >> it is being called the most critical moment in the 2012 campaign. >> arguably the most important night of romney's political career. >> my husband is completely confident, completely balanced, completely capable of doing th